package com.yang.mapper;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;

@Mapper
public interface UserMapper {

    @Select("select id from user")
    List<Long>selectAllId();

}
